Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a11aeb04f9fd50a0f66e82d27c764a419f3b33a4473086d0ffb80a6e7a84655f' 
  AND token = 'g0d1Aai6/guyYbhzxEaP9ZCX279YAb2beGRnYOEuYPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}